Roasting-furnace.



110. 821,181. r PATENTBD. 11111226, 1906.

- 1". KLEPETKO.

APPLICATION FILED NOV. 17, `1905.

y IH

To all whon/ t may concern i FRANK krinrnrko, ori'ivnivy YORK," N. Y. i

- ROASTING-FURNAGE.

applicati@ fiiediovgmber 17,1905. :amino: 287,860.

Be it known` that I, FRANK KLEPErKo, a cltlzen of the United States, residing at New York, in the county of New York and State .l of New York, have invented certain new and useful Improvements in Roa'tsting-Furnaces, of which the following is a full, clear, and eX*-V act description, referencebeing had to the accompanying drawings, forming a part thereo. l

My invention `has relation to 'improvements 1n rabble apparatus for roasting-fur-v u naces and in the method of cooling thesame and it consistsin the novel features more Y.fully set forth in the speciiicationand pointed out in the claims.

In the drawings, Figure 1 is a middle-vertical section of a portion of a conventional McDougall ore-roasting furnace, showing one of the forms ofmy invention applied thereto.

Fig. .2 is ak horizontalsection on the line 2 2 of Flg. Fig. 3 is a vertical section on line 3 3 of Fig. 2. Fig. 4 is a diagrammatic view showing a modified method. of circulation through the rabble shaft.` and arms, and Fig. 5 `is a diagrammatic view showing a second modification in the circulating system.

The object ofthe present invention is to utilize a combination of water and steam as a cooling medium in effecting the necessary reduction in the temperature, ofthe -hollow rabble-shaft and rabble-arms used in connecwith a view of preserving the rab tion with the. turret or McDougall. type of vroasting-furnace (or, in fact, any type permitting the joint circulation of water and steam through the hollow rabble apparatus) le apparatus against the destructive and deleterious effects ofthe gases and hightemperature to lwhichithese parts are subjected during the roasting operation. The use of watery in my present invention is coniined to those porthe aforesaid hearths.'

are usually tions of the rabble apparatus which are iden.-l

tified with the hottest hearths of the series composing the furnace, lthe steam being used' for cooling the remaining.v portions of the rabble apparatus disposed on either side of u In 'the turret type of furnace, where there are as a rule in the neighborhood of six or seven superposed hearths, the hottest portions ofy the furnace tiiied with these hearths are cooled by water and the remaining portions of the rabble i Specific/ation of Letters Patent.

. superior over the use Passing centrally confined to the third and fourthy 1b Y hearths. If the rabble shaft and arms iden-l y froml one fPatented June 26, 1,906.--

apparatus Aare cooled .by steam, (preferably that generated from the heating of the water employed to cool the first-mentioned por` tions of the shaft and arms,) not onlywill a' less quantity of water be used than would be necessary were all the hearths cooled by water, but the hottest hearthswill be more efficiently cooled than if cooled onlyby steam. In coolingy the hearths of a roasting-furnace the object ofcourse is to. abstractv as little heat fromthe charge as possible, so as not to interfere with the operation of effective roasting. At the same time the hearths must bel cooled suflciently-to insure against the destruction and deterioration of the shaft and arms used in stirring the charge, and

since the Vuse of water alone for cooling all the hearths results with some species of 'ore :in an undue abstraction of heat units from the charge and since the use of steam alone would in some cases result in an insufficient Icooling of the rabble apparatus to preserve` the same against the high heat of the fur-I nace chargeI contemplate by the use of water and steam as a circulating and singly. In referring meant of course is the cooling` ofthe rabble apparatus identified with the hearths, as it is the rabble shaft ,and arms to whichv the rcooling is. directed. The firstH expression, however,y is shorter andis used as a matter; of convenience.

The advantages of the prescombined 8o cooling medium results which are eminently of eitherwater or steam to `the cooling of the n f hearths in the present description-what is ent invention will better be apparent from af Adetailed description thereof, which is as fol.

lows: .l

Referring to the drawings, F represents the furnace, e which the material is treated, the said material dro ping from the upper hearth succes-y sively tfirough the several hearths until it is delivered linto the delivery hopper, (not showin) the hearths being provided, respec-v loo ,l tively,

with the central and marginal openingsy l -2 for the passage of the material.

into the several hearths andcarrying rakes 5, which the material. is successively fed hearth to the hearth immediately beneath it, all as fully understood in the art.

through the hearths is thel v rotatable hollow .rabble-shaft, from which` n radiate the series of hollow arms 4, extendingv 1o 5 and h the several hearths ini9`5 l W Iteferringvagain to the drawings, andpar- 1ro ticularly to Fig. 1 thereof, 6 represents a feeder or feed-pipe, (preferably stationary,) which is located within the shaft and extending preferably to a point corresponding to the third hearth from the bottom, there discharging into the shaft, the upper end of the feeder passing through a stuffing-box 7 from which extends the supplyipe 6', leading to any source-of water-supp y. (Not shown.) The shaft is divided into a series of compartments or chambers a b ed efg, the chambers being separated from one another by the on the opposite side and to one side of the Since the inlet end of the complementary pipe 9 is directly over the corresponding end of the pipe 9, the former, spanning, as it does, the partition 8, naturally exceeds the pipe 9 in length an amount equal to the diameter of the cross-section of the Shaft 0I the diameter of the partition 8, (where the shaft is cylindrical.) The upper end or top compartment of the shaft is provided wth an outlet or discharge pipe 10, the exhaust being conducted vto any desired point of consumption. The chamber or division c in the present instance is divided into two sections by means of the transverse partition 8', disposed across the shaft 3 and substantially in continuation of the upper surfaces of the pair of arms 4 in the second hearth, (fromthe bottom,) the feeder 6 discharging its water into the shaft above said partition 8 or into the upper section of the said compartment c. The lower section of said compartment, for convenience herein identified by the reference-letter c', may be considered as the space between the partition 8 and the partition 8 immediately beneath. Thus, as shown, the water discharges into the shaft at the third hearth from the bottom. The water so l( lischarged circulates, as shown by the arrows, through the conduit 9, leading from the compartment c, into one of the arms 4, l extending into the third hearth, thence through conduit 9 into the second arm of the same set, thence into compartment or chamber d and arms radiating therefrom, thence into the chamber e to a point substantially above or level with the upper walls of the arms leading from the base of said chamber. The water in the feeder 6 is of course injected in limited quantities, so that it may not completely ll the chamber e.

Leading from the top of the ycompartment extending from e and passing downward through the several partitions 8 8 to the bottom compartment c of the shaft is a steamipe 11, through whichthe steam generatedp in the chamber c above the surface of the water therein passes downward, discharging into compartment a at the bottom of the shaft and circulating through the conduits 9 9 and arms 4, as indicated, until it reaches the section c of the compartment c. From this point the steam passes through a second steam-pipe 12, which eads from said chamber c through the partitions separating compartments c, d, and c. The pipe 12 discharges into the conduit 9, leading from the compartment e, whence the steam circulates through compartments f and g, as indicated by the arrows, the exhaust finally escaping through the pipe 10. The ipe 10 leads from a sleeve or tube 13, enve oping the feeder, the stuffing-box 7 formin the upper end of said sleeve, which is couped to the roof of the furnace in any mechanical manner. The shaft freely revolves about said sleeve, a suitable stuffingbox 14 being interposed between it and the shaft. The exhaust passes into the sleeve 13, around the feeder 6, and out through the pipe 10, as already indicated, to any suitable source of consumption.

From the foregoing it will be apparent that under my new method of cooling the rabble apparatus the latter is virtually divisioned off into a series of portions or sections, one section for permitting the circulation of water therethrough and the remaining sections circulating the steam generated as a result of the heating of such water, the different sections having intercommunication established with one another by the steam-pipes conducting the steam to the bottom andtop of the shaft. By sections is herein meant not the specific compartments a b c d, &c., but the broad idea of divisioning the rabble apparatus so as to adapt it for the purposes herein contemplated, for it must be apparent that so far as the joint use of water and steam as cooling mediums is concerned the rabble apparatus and the means for circulating the mediums may be constructed in a variety of ways, the specific constructions here illustrated serving only as isolated examples. Thus in Fig. 1 the feeder enters from the top, and the general circulation of the steam after reaching the bottom compartment is upward, the exhaust being drawn off at the top. In Fig. 4 the feeder p enters from the bottom, and in this modification I first pass the steam from compartment e through a steam-pipe 15 into the top compartment g of the shaft, whence it circulates downward into the conduit 9, confined in one of the arms interposed between compartments e and f, thence through a downtake-pipe 16, leading from said conduit 9 to the space c above the compart- IOO IOS

IIO

' Again,

vplementary conduit 9 ment b, and thence circulating downwardv through the compartments b `and a -andftheir hollow arms and conduitsV 99 out through the vexhaust 10', located at" the" bottom. inFig. 5, the feeder denters at rthe top; but'a part of the steam generated'from the water in compartment @escapes downward through a steam-pipe 1 6 into the bottom compartment a, circulating upward through compartments a and b and space d andrpassing out through a conducting-pipe 17 into the top compartment g, whence it escapes through theexhaust or outlet 10. VAAnother part of the steampassves from the compartment e directly .through ing into the ladjacent hollow arm, the comthen conveying it into hence it vpasses into from said compartment the adjacent arm, compartment f and zo finto compartment gfas indicated by the arplied without rows', there tol join the exhaust coming from the pipe 17, whence the joint exhausts escape through the pipe 10, so that examples of specific circulations might be multiaecting the principle on which the present invention is based. While the steam which circulates through specified portions or divisions of the shaft and arms is derived from the heating of the water circulating in other portions, yet my invention contemplates any method which produces a circulation of water in one portion of a rabble apparatus and circulation of steam in another portion irrespective of the source whence such steam is derived, the main object being to introduce the water into those portions conceded and recognized in practice to be the hottest. The method of course need not be restricted in its application to roasting-furnaces, but ris applicable in any art where cooling is desired.

Having described my invention, what l claim is- 1,. In a rabble apparatus, a hollow shaft and hollow arms therefor, means for circulating a liquid cooling medium through a section ofthe shaft and correspondin portion of the arms, and a vapor of suchfliquid through the remaining portions of the shaft and arms, substantially as set forth.

2. ln a rabble apparatus, a hollow shaft and hollow arms therefor, means for circulatbody of water through a section of the shaft and corresponding portion of the arms, means for circulating steam generated therefrom through another section of the shaft and portion of the arms, and inlet means and outlet means for the circulating mediums,

substantially as set forth.

3. In a furnace, a hollow rabble apparatus divided into distinct sections, means for circulating water through a portion of the sections, and steam generated therefrom through another portion, substantially as set forth.

4. In a furnace, a hollow rabble apparatus the conduit 9, leadthe hearths, hollow shaft and extendin through, substantially as divided'r into distinct sections, means'for esj tablishing intercommunication between the several sections, means for circulating water through'aportion of the sections and means 'for conducting the steam generated from said water into the remaining sections and circulating the same therethrough-,substan- -tially as set forth. Y*

5. 'Ahollow rabble apparatusA divisioned i offinto a series of sections, means for circulating. `water through one of the sections, f means for circulating1 steam generated there.-

from through ,anv a acent section, and an outlet for the circulating mediums, substantially as set forth. v i

6. A hollow rabble apparatus divisioned oif into a series of sections, means for circulating a'body of water through one of the sections, means for circulating steam generated from said circulating body, through an adj acent section, and an exhaust or outlet for the circulating mediums, substantially as set forth. l

7..A hollow rabble apparatus divisioned off into la series of intercommunicating sections, means for circulating a body of water through one of the sections, and means for circulating the steam generated from said body of water into an adjacent section and circulating the same therethrough, substantially as set forth.

8. ln a furnace having a series of superposed hearths, a hollow shaft passing throu h arms radiating from the into the several hearths, suitable means for ividing the shaft into sections having corresponding arms communieating therewith, means for circulating a body of water through a given section and through the hollow arms correspondin thereto, and means for circulating a body o steam through a section and arms adjacent to the water-section, substantially as set forth.

9. In a furnace having a series of superposed hearths, a hollow shaft passing throu h the hearths, hollow larms radiating from the shaft and extending into the several hearths, means for dividing the shaft into intercommunicating sections having corresponding arms communicating therewith, means for circulating a body of water throu h an intermediate section and its arms, and means for conducting the steam generated from said body of water, into an adjacent section and its arms and circulating said steam thereset forth.

10. In a rabble apparatus, a hollow shaft, series of hollow arms disposed alon and radiating from the walls thereof, suita le partitions dividing off the shaft and arms into independent intercommunicating sections, means for circulating a body ofwater through the central section and its arms, and means for conducting the steam generated from said water into the sections and armson eitherl IOO IIO

side of the middle section, and circulating aidhsteam therethrough, substantially as set ort l1. In a rabble apparatus, a hollow shaft and hollow arms therefor, the shaft being divided off into a central section closed at the bottom for retaining a body of water, and adjacent sections adapted to receive the steam generated from said body of water, and means for circulating the water and steam through their respective sections of the shaft and their corresponding arms, substantially as set forth.

l2. In a rabble apparatus, a hollow shaft and hollow arms therefor, the shaft being divided off into a central section closed at the bottom for retaining a body of water, and adjacent sections on either side of the central section, pipes for conducting the steam out of said central section to the adjacent sections,

and means for circulating the water and steam through their respective sections of the shaft and their corresponding arms, substantially as set forth.

13. In a furnace, a hollow rabble apparatus having distinct cooling mediums circulating through distinct portions of the apparatus, inlet means for said mediums, and a conimonv outlet means, substantially as set forth.

14. In a furnace, a hollow rabble apparatus and means for circulating water through the hotter portions thereof, and steam through the comparatively cooler portions, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

' FRANK KLEPETKO.

Witnesses:

MAUDE C. WILLIAMS, A. F. FULLBERG. 

